Safety and security are two very different concepts. Yet both are often confused, as demonstrated in this video we recorded at an airport.

Aviation security is the set of measures and resources implemented to prevent malicious acts ( terrorism ) targetting aircraft, their passengers and crew members. One measure involves the notion of deliberate human intervention. For example,X-rayand explosives trace-detection portal machines in airports contribute to security (photo).

Aviation safety relates to protection against all accidents, errors or unintentional defects in the design, construction, maintenance and operation of aircraft.

Whilst air transport is the safest means of transportation in the world, its security has always been at the heart of the aviation industry's concerns. In matters of aviation security, although much progress has been made since September 2001, a lot still remains to be done in light of the recent tragic events. A challenge in the the coming years well beyond the scope of airtravel.

AFP press agency said Saturday graffiti in Arabic had been found sprayed on easyJet and Vueling aircraft at airports in France.